Civil servants working in Sioux Falls city government are getting raises.

City councilors Tuesday signed off on a two-year labor contract with the American Federation of State, County and Municipal Employees (AFSCME) that gives more than 500 city employees a 2.5 percent pay bump in 2019 and another 3 percent raise in 2020.

The new labor contract also adds a 50 cent pay differential for employees who work shifts between 6 p.m. and 6 a.m. at both the water purification and waste water reclamation plants.

"These sessions were very professional, collaborative and productive between the city and AFSCME, and I was very pleased with the process and outcome," Sioux Falls Human Resources Director Bill O'Toole said ahead of Tuesday's City Council meeting. "The AFSCME members overwhelmingly voted to approve the terms of the labor contract, and now the City Council will be asked to ratify the contract tomorrow night."

O'Toole said the city held four negotiation sessions with AFSCME before the deal was struck.

It's the second time this month the Council has OKed a new labor deal with a union representing city employees. The Sioux Falls Firefighters Association's two-year deal also calls for 2.5 percent and 3 percent wage increases in 2019 and 2020, respectively.

That just leaves the Fraternal Order of Police (FOP) still working toward a new deal with the city. O'Toole and the FOP union representative both say they're optimistic the two parties will be able to reach a deal before the current contract expires at year's end.

That wasn't the case during the last round of contract talks with the police union, though. In 2016 when the city was negotiating the terms of the current labor contract, the union declared an impasse when City Hall wouldn't budge from its offer of a 1.5 percent increase in 2017 and 2018.

"At this point the FOP is hopeful that continued negotiations will result in an offer from the city that can be taken to the membership for a vote," Tom Wilka, the Sioux Falls attorney representative for the FOP, said in an email Monday.